Wire drawing block



Aug 17, 1943-v I F. ZETTERGREN 2,327,149

WIRE DRAWING BLOCK Filed NOV. 20, 1942 Patented 17, 1943 UNiTE s'rATEs `PATENT OFFICE WIRE DRAWING BLOCK Fritz Zettergren, New Haven, Conn. Application November 20, 1942, Serial No. 466,381

4 Claims.

and made to rotateon substantially a verticallydisposed shaft. There are arranged in a plurality of holes concentrically arranged in the top of the block, a plurality of pins commonly known as stripper pins. It is the purpose of such pins to coil and support the wire as the block rotates and as the wire is delivered from. the drawing operation. After the desired amount of wire is coiled around the pins on the block, the pins are removed so as to facilitate the removalof the finished coil of Wire. Heretofore, the pins were loosely disposed in the holesfin the block in order that they may be quickly and conveniently removed when desired to remove the coiledwire. oftentimes, as the convolutions of the coiled Wire collected and were built up around the pins on the block, the wire would tend to have a lifting effect on the pins and unseat them from their positions in the holes in the block. Occasionally, these pins would pull entirely out of the block by such action of the wire and -be thrown out and away from the block thereby causing damage to of the following specification and will be particularly pointed out in the appended claims.

In the accompanying drawing there is shown,

for the pur-pose of illustration, an embodiment which my invention may assume -in practice.

Figure 1 is a plan view of the improved stripper block of my inventionwith one of the pinlike members removed from its position therein.

Figure 2 is a sectional View taken on line II-II of Figure 1.

Figure 3 is a detail view of the inner end of one of the pin-like members showing the bayonet locking arrangement disposed thereon, and

Figure 4 is a sectional view taken on line IV-IV of Figure 1.

Referring more particularly to the drawing, the improved wire drawing block of my invention consists of a circular stripper block 2 having preferably a smaller circularly arranged flange portion 3 disposed on one side thereof.

There is arranged centrally of the stripper block 2, a hole 4 having a key-way 5 arranged along y the side thereof. A shaft 6 is adapted to be inthe finished wire or machine, or injury to the machine operator or other workmen in the vicinity thereof. Thus it will be seen that the use of such loosely disposed pins in blocks were for these reasons unsatisfactory.

In the present invention, there is provided a stripper block in which the stripper pins are locked in position in the holes in the block thereby preventing unintentional displacement of the pins and eliminating the above mentioned disadvantages.

Accordingly, it is the general object of the present invention to provide a stripper' block in which the stripper p'ins are locked in position therein, and, at the same time, a stripper block in which the stripper pins can be easily and quickly removed therefrom to facilitate the removal of the coiled wire.

It is another object of this invention to provide animproved stripper block which is simple and inexpensive in its construction, and yet one which is eicient, effective and safe in its'use.

Various other objects and advantages of this invention will be more apparent in the course serted in the hole 4 and keyed thereto by means of a key 'l arranged in the key-way 5.

Around the ange portion 3 of the stripper block 2, there are disposed a plurality of holes 8, namely, four in the present instance, which are concentrically arranged and extend substantially perpendicularto the plane of the stripper block 2. Along lthe sides of each of the holes 8, there is arranged preferably an L shaped slot 9. In each of the holes 8 there is adapted to be positioned a. pin-like member I0 having a conventional bayonet locking arrangement disposed on the inner end thereof. On the opposite end of each oi. the pin-like members Il), there is arranged an enlarged portion preferably in the formof an eye portion I2. The bayonet locking arrangement on each of the pin-like members l Il consists of a pin or projecting lug portion i3 arranged on the periphery of the pin-like member adjacent the inner end thereof and extending radially outwardly therefrom. In the bottom of each of the holes 8 there is disposed resilient means, preferably a, coil spring I 4 against which the inner end of the pin-like member when disposed therein is adapted to abut.

It will be understood that the bayonet locking arrangement functions in a conventional manner. In other words, when any one of the pin-like members I0 is inserted in any one .of the holes 8, the pin or projecting lug portion I3 on the side thereof is disposed opposite the upper end ofthe L shaped slot 9 and as the pin-like member is moved into the hole the lug portion I3 moves inwardly along the slot 9. After the pin has been inserted in position in the hole and the lug I3 carried thereby has reached the bottom of the L shaped slot 9, it will be seen as shown in Figure 2 of the drawing that the inner end of the pin will be seated on the coil sprl-ng Il therein. The pinlike member is then rotated through a small angle until the pin or lug I3 reaches the outer end of the bottom part of the L shaped slot 9. When the lug I3 reaches this point the pin-like member will be forced outwardly due to the action of the coil spring I4 and the pin or lug I3 will also move outwardly therewith and be seated in the extreme end of the L shaped slot as shown in Figure 2 thereby locking the pin-like member I invposition in the hole 8 of the stripper block, so as to prevent unintentional movement or displacement thereof.

The improved stripper block of my invention is used in the following manner:

The stripper block 2 is disposed in substantially a horizontal plane on the vertically disposed shaft 6 adjacent the wire drawing operation or at the point it is desired to coil the Wire. After the pin-like members I0 have been inserted in position in the holes A8 of the stripper block 2 in a manner which has hereinbefore been described, the wire is delivered to the stripper block from the wire drawing operation and as th'e wire is delivered thereto. the stripper block is made t0 rotate and the Wire is coiled around the pin-like members I0. After the desired amount of wire has been coiled or collected on the stripper block and is disposed around the pin-like members I0, the pin-like members are removed from their positions in the holes 8 of the stripper block in a manner reverse from that for positioning them therein. After the pin-like members have been removed from the block it will be seen that the coil of wire can be easily lifted from the top of the stripper block. After the coil of wire has been removed therefrom the pin-like members IIl are again inserted in their positions in the holes 8 and the stripper block is ready for the next coiling operation. It will be seen that the enlarged eye portions I2 on the outer end of the pin-like members I0 prevent the convolutions of wire from creeping up and passing over the upper ends of the pins. The eye portions I2 also serve as a handle portion for aiding in positioning and removing the pins from their assembled positions in the holes of the stripper block.

As a result of my invention it will be seen that v there is provided an improved stripper block wherein the stripper pins are 'securely locked i-n position in the block and will not be forced out of position therein as the convolutions of the coil are built therearound. It will also be seen that the stripper pins may be easily and quickly assembled in position in the block or removed therefrom.

In the accompanying drawing there is shown, for the purpose of illustration, an embodiment which my invention may assume in practice.

I claim:

1. A device of the class described comprising a rotatable block having a plurality of holes concentrically arranged therein on one side thereof, a plurality of removable pin-like members with one adapted to be disposed in each of said holes. each of said pin-like members having a bayonet locking arrangement disposed on the inner end thereof which is adapted to cooperate with an L shaped slot arranged along the sides of each of said holes, and resilient means arranged in the bottom of each of said holes which is adapted to bear against the inner end of each of said pinlike members when positioned in said holes, said resilient means in each of said holes adapted to force the pin-like member therein outwardly so that the lug of the bayonet lock on the pin will be forced outwardly and up into the end of the L shaped slot thereby maintaining the pin-like member in a-locked position in the hole of said block.

2. A device of the class described comprising a rotatable block having a plurality of holes con- I centrically arranged therein on one side thereof,

a plurality of removable pin-like members with one adapted -to be disposed in each of said holes, each of said pin-like members having a bayonet locking arrangement disposed on the inner end thereof which is adapted to cooperate' with an L shaped slot arranged along the sides of each of said holes, and a coil spring arranged in the bottom of each of said holes in said block and adapted to bear against the inner end of said pinlike members, said coil spring in each of said slots adapted to force the pin-like member therein outwardly so that the lug of the bayonet on the pin will be forced outwardly and up into the end of the L shaped slot thereby' maintaining the pin-like member in a locked position in the hole of said block. f

3. A device of the class described as defined in claim 2, including an enlarged portion arranged on the outer end of each of the pin-like members for preventing the convolutions of the coil of wire from slipping up over the outer end of the pin-like members.

'ou-ter end of each of the pin-like members for preventingthe convolutions oi the coil of wire -from slipping up over the outer end of the pinlike members.

FRITZ ZEI'IERGREN. 

